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United States Patent | 5,173,880 |
Duren ,   et al. | December 22, 1992 |
A method of deterministically computer generating a model of a response voltage waveform of a seismic receiver employed in a seismic, particularly marine, data gathering system, the model incorporating factors that have been identified as significant contributions to amplitude, such as directivity, divergence, attenuation, interbed multiples, and transmissivity. The model is generated from the mathematical manipulation of well log data and data gathering system characteristics into a seismic range equation, namely: ##EQU1## where E.sub.r (f)=received energy density E(f)=radiated energy density D(.theta..sub.s, .phi..sub.s, f)=source directivity along .theta..sub.s, .phi..sub.s direction at the source A.sub.c (.theta..sub.H, .phi..sub.H, f)=Capture area along .theta..sub.H, .phi..sub.H direction at the hydrophone array R.sub.T =target reflection coefficient D.sub.v =divergence ##EQU2## One preferred use of the resulting modeled waveform is in a pre-process comparison with actual seismic data for validating and interpreting such actual data. Another use is in the deconvolution of seismic data for improved resolution.
Inventors: | Duren; Richard E. (Spring, TX); Zimmerman; Carol J. (Houston, TX) |
Assignee: | Exxon Production Research Company (Houston, TX) |
Appl. No.: | 610467 |
Filed: | November 8, 1990 |
Current U.S. Class: | 367/73; 367/21; 367/38; 702/17 |
Intern'l Class: | G01V 001/28; G01V 001/36 |
Field of Search: | 364/73,421 367/21,38,73,48,22,23,24,47 |
3008120 | Nov., 1961 | Hicks | 367/25. |
3009527 | Nov., 1961 | Berryman et al. | 367/73. |
3275978 | Sep., 1966 | Shanks | 367/44. |
3409871 | Nov., 1968 | Hefring | 367/51. |
3739328 | Jun., 1973 | Beil | 367/25. |
4293933 | Oct., 1981 | Park et al. | 367/25. |
4314339 | Feb., 1982 | Kenyon | 364/422. |
4403290 | Sep., 1983 | Clavier et al. | 364/422. |
4649526 | Mar., 1987 | Winbow et al. | 367/35. |
4752916 | Jun., 1988 | Loewenthal | 367/24. |
Yu, Gary, "Offset-Amplitude Variation and Controlled-Amplitude Processing", Geophysics, vol. 50, No. 2, 1985, pp. 2697-2708. Skolnik, M. I., "Introduction to Radar Systems", McGraw Hill Book Company, New York, 1962, pp. 3-5, 570-579. Waters, K. H., "Reflection Seismology, a Tool for Energy Resource Exploration", John Wiley and Sons, New York, 1981, pp. 27-47, 254-259. Haslett, R. W. G., "The Quantitative Evaluation of Echo-Sounder Signals from Fish", Journal of British Institution for Radio Engineers, Jul. 1961, pp. 33-40. Duren, Richard E., "A Theory for Marine Source Arrays", Geophysics, May 1988, pp. 650-655 vol. 53, No. 5. Barton, David K., Radar System Analysis, Prentice-Hall Inc., New Jersey, 1965, pp. 109-138. O'Doherty, R. F. and Ansley, N. A., "Reflections on Amplitudes", Geophysical Prospecting, vol. 19, 1971, pp. 430-458. Newman, P., "Divergence Effects in a Layered Earth", Geophysics, vol. 38, No. 3, 1973, pp. 481-487. Koefoed, O., "Reflection and Transmission Coefficents for Plane Longitudinal Incident Waves", Geophysical Prospecting, vol. 10 pp. 403-51. Mayme, W. H., "Common Reflection Point Horizontal Data Techniques,"Geophysics, vol. 27, No. 6, 1962, p. 927. Brillinger, D. R., "An Introduction to Polyspectra", Annals of Mathematical Statistics, vol. 36, 1965, pp. 1351-1374. "AVO (Amplitude vs Offset)": Usage/Misusage, Fraiser, C. W., 58th Ann. Soc. Explor. Geophys. Int. Mtg. Oct. 30, 1988. |